EP0838379A1 - Template for visual check of the normal error of a wiper arm of an oscillating wiper device - Google Patents

Abstract

The template (10) can be fitted in a definite reproducible position on the windscreen (11) underneath the connecting section (7) of the wiper arm free of the wiper blade. The template has at a height above the surface of the windscreen a flat check surface (13) for supporting the connecting section. The check surface runs relative to the windscreen at the angle alpha proposed for the relevant pendulum wiper device or relevant vehicle model. The angle alpha of the check surface relative to the windscreen corresponds to the normal fault of the wiper arm in the parking position. The check surface has an oblong narrow shape whose length across the wiper arm is at least as large as the width of the connecting section of the wiper arm.

Description

The invention relates to a template for visual Testing the normal error of a wiper arm of a pendulum wiper device for the window of a vehicle with the Features of the preamble of claim 1.

It is known that the windows of a vehicle are curved or are curved to the air resistance of the To lower the vehicle. On the other hand, good wiping quality the pendulum wiper devices used on such vehicles to achieve the wiper blade in every operating position at right angles to the one to be wiped Put the disc on. With curved or curved panes would be a constant adjustment of the angular position of the Wiper blade depending on the window curvature or the wiping angle required. There are already several Known proposals, which a twisting of the wiper blade or provide the wiper arm about its longitudinal axis. However, such wiper arms or wiper levers cause high levels Manufacturing costs and are also prone to failure.

A very common compromise solution is assumed from that the wiper blade in the most important area of the wiping field, namely approximately in its central area, vertically should be on the disc. In the peripheral areas, i.e. in the reverse positions or in the park position then gives way the actual position of the wiper blade to a point Angle from the vertical position, which is approximately between Is 0 and 5 degrees. This deliberate deviation is in Specialists also referred to as normal errors. Reached This desired normal error is set, for example by a corresponding from the vertical Position on the disc different position of the wiper shaft.

Through various influences, such as an improper one Disassemble the wiper arm or by the influence a car wash, it may happen that the desired Position of the wiper blade in relation to the window, which includes the normal error has been changed is. Mostly does when operating the windshield wiper device a rattling of the wiper blades on the window for this error attentive to a significant deterioration in the Wipe quality. In the book "Wiper and washer systems for vehicles "by the author Eckhardt Schmid, Verlag Moderne Industrie AG, Landsberg / Lech, ISBN 3-478-93089-8, Page 64 and Figure 47, is recommended when occurring a chatter of the wiper blades the proper Position of the wiper blades on the window to be wiped check and correct if necessary. For this purpose, the wiper arm by switching off the ignition in the middle area of the wiping area stopped and the wiper blade from the wiper arm be removed. Now check whether the wiper arm hook, i.e. the connection section freed from the wiper blade of the wiper arm for the wiper arm-wiper blade connection, with its underside lies flat on the disc. If one wedge-shaped air gap between the wiper arm hook and the Is visible, is a corresponding correction of the Position required.

A disadvantage of this recommended type of control or correction the wiper blade position is that the connecting section the wiper arm, i.e. the wiper arm hook, with its Place the underside directly on the window to be wiped got to. It is difficult to visualize the Assess the position of this wiper arm hook in relation to the window, since it is not possible to put the eye in the contact plane between wiper arm and window. On the other hand there is of course a great risk that the disc through Unintentional opening of the wiper arm is damaged or scratched becomes.

The object of the invention is to eliminate them Defects by providing a cheap and easy to use handling means for checking the exact position of the wiper blade or wiper arm compared to the window.

According to the invention, the task is performed using a template solved the features of claim 1, wherein in the sense of Invention of normal errors also include the amount of 0 degrees should. By using the template which between the window and the wiper arm freed from the wiper blade is to be arranged, the wiper arm is prevented accidentally immediately under the action of its pressure spring hit the surface of the disc and this can damage or scratch. Still located the contact point responsible for checking the normal error between the test surface of the template and the wiper arm now at a certain height above the surface the disc. This makes it much easier to do that human eye to assess the position of the wiper arm in a viewing plane above the surface of the pane bring to. This makes the visual much easier Determine whether the bottom of the connection section of the wiper arm lies flat on the test surface of the template and thus the wiper arm position opposite the window correctly corresponds to the given normal error. If however, between the bottom of the connecting section of the wiper arm and the test surface of the template a wedge-shaped Air gap is visually perceptible, there is a deviation the wiper arm position from the intended or prescribed normal mistakes before. If this deviation is not too large, can be carefully Bending the wiper arm can be made a correction. If there is a major deviation, the exchange will likely be of the wiper arm required.

Advantageous developments of the invention are in the subclaims 2 to 8 specified.

A further development according to claim 2 makes it possible with the help the template the normal error of the wiper arm in the Check parking position. Contrary to the known, recommended Method for checking and correcting the normal error must in this training, the wiper arm does not only become one anyway not exactly defined position in the middle area of the wiping field. Checking the normal error always takes place in the defined parking position of the wiper arm, so that the test accuracy is improved.

A training according to claim 3 ensures a good one visual perceptibility of the position of the wiper arm in comparison to the template.

It should also be noted that a template according to claim 1 as a mass product in the form of an injection molded part made of plastic is extremely inexpensive to manufacture.

If a template according to the invention according to the training overall an elongated part whose thickness corresponds to the width of its test area, the stencil is extremely space-saving. Furthermore can produce such a template inexpensively a profile strand in extrusion or continuous casting or Extrusion process and subsequent cutting to length generated strand can be produced.

A tipple-free and precisely defined tangential support to ensure the template on the surface of the pane, provides a development according to claim 5 that the Template on the side to be placed on the pane Has feet, each preferably on one of the opposite Provided ends of this side of the template are.

Another development of the invention according to claim 6 sees a three-point support of the template on the pane in front. This is to be placed on the pane by three feet Reachable side of the template, preferably a foot in the middle of one end of the template underside and the remaining two feet at the opposite end of the Template underside and at a distance on both sides from the vertical center plane of the template are. This training has the particular advantage that the template was not held when checking the normal error must become. The three-point support and the contact pressure of the wiper arm in the direction of the window ensure one appropriate holding of the template during the test process.

A further development of the invention is preferred 7, which provides that the template has several test areas has, each opposite at a different angle α the disc run. If these different Test areas each for the normal errors different Vehicle types are designed is one Template can be used universally.

A development according to claim 8 is aimed at that the template is the stylized shape of a vehicle or a wiper blade or the like, wherein one such template also as a keychain or the like can be formed. This training serves essentially an appealing style of the template or a storage option for the template directly on the vehicle key.

Fig. 1

einen Wischarm einer Pendelwischervorrichtung,

Fig. 2

eine Schablone während der Prüfung des Normalenfehlers,

Fig. 3

eine Draufsicht von Fig. 2,

Fig. 4 a u.b

die Prüfung einer vom vorgeschriebenen Wert des Normalenfehlers abweichenden Stellung des Wischarmes,

Fig. 5

eine Schablone mit mehreren Prüfflächen,

Fig. 6 a - c

verschiedene stilistische Formen einer Schablone zur visuellen Prüfung des Normalenfehlers.

The invention is described in more detail below on the basis of exemplary embodiments. In the accompanying drawings:

Fig. 1

a wiper arm of a pendulum wiper device,

Fig. 2

a template during the inspection of the normal error,

Fig. 3

2 shows a top view of FIG. 2,

Fig. 4 a ub

checking a position of the wiper arm that deviates from the prescribed value of the normal error,

Fig. 5

a template with several test areas,

6 a - c

various stylistic forms of a template for visual inspection of the normal error.

In Fig. 1 is a wiper arm of a pendulum wiper device shown partially cut. The wiper arm has a fastening part 1, which rotatably on a pendulum drivable wiper shaft 2 is attached. A cover cap 3 covers the entire fastening part 1. Am free end of the fastening part 1 is about the axis 4 the articulated part 5 is pivoted. In a known way Way is an extension of the hinge part 5, a wiper rod 6 attached to the hinge part 5. At its free end the wiper rod 6 has a connecting section 7 which is designed as a hook in this case. Via the connecting section 7 is the wiper arm in a known manner a wiper blade connectable, which with its wiper strip rests on the window to be wiped and this during operation the wiper device in a predetermined wiping field sweeps over. A pressure spring 8 designed as a tension spring is under tension with one end on the joint part 5 or on the end of the wiper rod protruding into the joint part 5 6 and at the other end by means of a C-bracket 9 behind the Axis 4 hooked on the fastening part 1.

Fig. 2 shows the use of a template 10 for visual Checking the normal error of a wiper arm according to FIG. 1. 2 is an enlarged view of the connecting section 7 with a view in the longitudinal direction of the wiper arm shown. The template 10 is below that of one Wiper blade free connection section 7 on the wiper rod 6 on the surface of the window 11 of the vehicle put on. The template 10 is essentially transverse arranged to the longitudinal direction of the wiper arm or wiper rod 6 and thanks to a three-point support, it is non-tilting Disc 11 placed. The three-point rest will be like 3 by three feet 12 realized which from the bottom of the template 10 in Protrude towards disc 11. This three-point support has the particular advantage that the template 10 is an exact occupies a defined position on the disk 11 and during the test procedure does not have to be kept. The bottom the connecting section 7 lies on a test surface 13 stencil 10 on the top of the stencil 10 is located. It is important here that the test surface 13 is designed so that when placed on the disc 11 Template 10 at an angle α with respect to the disc 11 runs, which that for the pendulum wiper device used or for the vehicle model in question provided normal error corresponds.

2 and 3 it can be seen that the test surface 13th has a long and narrow rectangular shape, wherein the test surface 13 is longer than the width of the wiper rod 6. This shape of the test surface 13 causes a good visual Recognizability of the position of the underside of the connecting section 7 in relation to the test area 13. The middle Area 14 of the template 10 can save material Breakthrough or as a stencil that improves the grip security Be raised or deepened.

stellt somit eine Abweichung vom vorgegebenen normalen Fehler in positiver Richtung dar. In beiden zuvor beschriebenen Fällen, gemäß Fig. 4a und b, ist eine Korrektur des Normalenfehlers des Wischarmes erforderlich, da ansonsten erhebliche Einbußen hinsichtlich der Wischqualität hingenommen werden müssen.4a and b it can be seen that the position of the wiper rod 6 or of the connecting section 7 is not correct because it deviates from the normal error provided, ie from the predetermined angle α. This deviation is visually recognizable by a wedge-shaped air gap which is formed between the underside of the connecting section 7 and the test surface 13 of the template 10. In Fig. 4a, the connecting section 7 rests only with the right edge on the test surface 13 of the template 10, the wedge-shaped air gap opens to the left with an angle β. In comparison with the correct position of the wiper arm shown in FIG. 2, the angle β represents a deviation from the predetermined normal error in the negative direction. In the exemplary embodiment according to FIG. 4b, between the underside of the connecting section 7 and the test surface 13 of the template 10 there is also a wedge-shaped air gap can be seen, but is open to the right. The angle formed between the underside of the connecting section 7 and the test surface 13

thus represents a deviation from the specified normal error in the positive direction. In both of the cases described above, according to FIGS. 4a and b, a correction of the normal error of the wiper arm is necessary, since otherwise considerable losses in terms of wiper quality have to be accepted.

5 shows a template 10 which can be used universally. This template 10 is characterized by the three Test areas 15, 16 and 17. These three test areas 15, 16 and 17 are each in a different one angle α corresponding to normal errors with respect to Disk 11 arranged. For example, the test area 15 at an angle α = 0 degrees, the test surface 16 at an angle α = 3 Degrees and the test surface 17 at an angle α = 5 degrees be. This would make the main spectrum more common normal errors due to this one template 10 covered with three test areas 15, 16 and 17. Except for the essential Difference in the test areas corresponds the template according to the embodiment of FIG. 5 essentially that of the exemplary embodiment 2 and 3.

In the exemplary embodiments according to FIGS. 6a-c, the Stencils 10 each have an elongated part, the thickness of which Width of the test area 13 corresponds. That's why they own Stencils 10 each have only two feet 12 on their underside. In these cases, however, the template 10 should be checked of the normal error to be held over to tip over under the action of the elasticity of the wiper arm to avoid. To hold the templates 10 are here corresponding holding sections 18 are provided. 6a and b, these holding sections 18 each have an opening 19, so that in these cases the template 10, which also in Fig. 6a to improve the decorative effect the shape of a stylized wiper blade and in Fig. 6b Has the shape of a stylized car as a key ring can be used. In Fig. 6c it can still be seen that not to rest on the disc 11 or as a test surface 13 serving areas with a label or different Characters can be provided.

Reference list

1

Fastener

2nd

Wiper shaft

3rd

Cover cap

4th

axis

5

Joint part

6

Wiper rod

7

Connecting section

8th

Contact spring

9

C-frame

10th

template

11

disc

12th

foot

13

Test area

14

Area

15

Test area

16

Test area

17th

Test area

18th

Holding section

19th

breakthrough

α

angle

β

angle

angle

Claims (8)

Template for the visual inspection of the normal error of a wiper arm of a pendulum wiper device for a window (11) of a vehicle, characterized in that the template (10) under the connection section (7) of the wiper arm freed from the wiper blade for the wiper arm-wiper blade connection in a defined and reproducible position on the disc (11) and that the template (10) at a height above the surface of the disc (11) has a flat test surface (13, 15, 16, 17) for supporting the connecting section (7), which at an angle α with respect to the window (11) provided for the pendulum wiper device or vehicle type in question. Template according to claim 1, characterized in that the angle α of the test surface (13) relative to the disc (11) corresponds to the normal error of the wiper arm in its parked position. Template according to Claim 1 or 2, characterized in that the test surface (13, 15, 16, 17) of the template (10) has an elongated and narrow shape, the length of the test surface (13, 15, 16, to be arranged transversely to the wiper arm) 17) is at least as large as the width of the connecting section (7) of the wiper arm, and that the height of the test surface (13, 15, 16, 17) of the template (10) above the surface of the disk (11) is at least the width of the connecting section (7) corresponds to the wiper arm. Template according to one of the preceding claims, characterized in that the template (10) is an elongated part as a whole, the thickness of which corresponds to the width of the test surface (13). Template according to claim 4, characterized in that the template (10) on the side to be placed on the disc (11) has two spaced feet (12) which are preferably provided on the opposite ends of this template side. Template according to one of claims 1 to 3, characterized in that the template (10) has a three-point support on the side to be placed on the pane (11). Template according to one of the preceding claims, characterized in that the template (10) has a plurality of test surfaces (15, 16, 17) which each run at a different angle α with respect to the pane (11). Template according to one of the preceding claims, characterized in that the template (10) has the stylized shape of a vehicle or a wiper blade or the like and / or is designed as a key ring or the like.

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